Akka演员测试

Question

由于我目前正在为我的Akka应用程序编写测试用例(http://doc.akka.io/docs/akka/snapshot/scala/testing.html),我想知道是否有办法测试一个actor 的界面.我的意思是,我想检查目标actor 的receive方法是否处理消息A或否.想象一下以下场景:

Actor A可以处理消息b和c.演员B想要向演员A发送消息b和a.为了确保这很好用,我想写一个测试用例,确保演员A正在处理消息a和b.

Answer 1

这取决于你想要测试的内容.

由于receive方法是a PartialFunction,你可以这样做isDefinedAt测试:

$ sbt test:console
scala> import akka.actor._
scala> import akka.testkit._
scala> class MyActor extends Actor {
         def receive = {
           case n: Long => println("Got %d".format(n))
           case s: String => println("Got %s".format(s))
         }
       }

scala> implicit val system = ActorSystem()
system: akka.actor.ActorSystem = akka://default

scala> val myActor = TestActorRef[MyActor]
myActor: akka.testkit.TestActorRef[MyActor] = TestActor[akka://default/user/$$a]

scala> val underlying = myActor.underlyingActor
underlying: MyActor = MyActor@365d7762

scala> underlying.receive.isDefinedAt(123L)
res0: Boolean = true

scala> underlying.receive.isDefinedAt("banana")
res1: Boolean = true

scala> underlying.receive.isDefinedAt(true)
res2: Boolean = false

scala> underlying.receive.isDefinedAt(123)
res3: Boolean = false

scala> underlying.receive.isDefinedAt(null)
res4: Boolean = false

scala> system.shutdown()